Clayton Medical Associates, P.C.
NPI 1891774329 · Rheumatology Physician · Saint Louis, MO
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clayton Medical Associates, P.C. is a Rheumatology Physician organization in Saint Louis, MO (NPI 1891774329).
Provider details
- NPI number
- 1891774329
- Entity type
- Organization
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Laci Hueffmeier, Practice Administrator(314) 645-4434
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Other names (DBA / former)
- Doing business as
- Saint Louis Rheumatology
Registry dates
- Enumerated
- 2006-01-12
- Last updated
- 2026-03-19
- Certified
- 2026-03-19
Frequently asked questions
- What is Clayton Medical Associates, P.C.'s NPI number?
- Clayton Medical Associates, P.C.'s National Provider Identifier (NPI) is 1891774329, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Clayton Medical Associates, P.C.?
- Clayton Medical Associates, P.C. is classified in the NPPES registry as Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Clayton Medical Associates, P.C. located?
- Clayton Medical Associates, P.C.'s practice location on file with NPPES is 520 S Elm Ave, Saint Louis, MO 63119-3845.
- What is Clayton Medical Associates, P.C.'s phone number?
- The practice phone number listed in the NPPES registry for Clayton Medical Associates, P.C. is (314) 645-4434.
- Does Clayton Medical Associates, P.C. accept Medicare?
- Clayton Medical Associates, P.C. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Clayton Medical Associates, P.C.?
- The authorized official listed on Clayton Medical Associates, P.C.'s NPPES record is Laci Hueffmeier, Practice Administrator. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Clayton Medical Associates, P.C.'s NPI active?
- Yes — Clayton Medical Associates, P.C.'s NPI (1891774329) is active in the NPPES registry as of the last update on 2026-03-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.